About this 3D model

3D view looks broken, but STL is OK. Very strong shelf holder, I loaded it 20kg.It is easy to put on 6-8mm dowels.The depth of the shelf is 16-20cm. Сustomization If you are familiar with Blender, you can customize the model to your liking.Look last screenshot:Three array modifiers allow you to make a grid of any size.Modifier solidify allows you to change the thickness of the walls of the gyroid (default 1.6mm).Subserf smoothes the grid.Boolean:1 Form intersect - defines the outer edge of the entire gyroid.2 Cube union - the back plate is like an ingot of gold.3 Hole dawn differense and 3 Hole top differense - forms of holes for fastening.When done, select Gyroid Shelf and Export. That is, it is not necessary to apply modifiers.